Hello all! I have an 07’ G35 Coupe (VQ35DE) that I’ve been having some issues with the last couple of days.
Was driving down the business highway in my town the other night going 60 with the cruise set when all of a sudden the cruise shut off, check engine light popped on, and the car wouldn’t accelerate. I pulled over and saw a ton of smoke coming out of the engine bay.
Upon further investigation the next morning, I had discovered my radiator cap failed and coolant was simply boiling out. Now, after getting a new cap, attempts to refill my coolant have been unsuccessful. The radiator acts full, and the reservoir (which is shared with my supercharger), is full.
I now believe that I have to bleed the system due to all the coolant getting spilled out that night and air getting in. Opening the bleeder by the battery compartment on the left side hasn’t helped at all however.
I’m stumped on what to do and I was hoping for some assistance from some fellow G & Z owners. The radiator refuses to take more coolant despite me only adding a quart of coolant so far.
When I drive the vehicle, it stays at normal operating temp for a little less than 5 minutes, then begins to skyrocket again.
Both the water pump, thermostat, radiator, and hoses are brand new.
Any help is greatly appreciated. I plan to keep this thread updated as to help any other people with the same problem.

 

You need to raise up the front end of the car, and bleed with a non-spill Funnel. These cars are rough to get the air out of the cooling system. Once you are set though, it is solid.

I think @cleric670 recommends bleeding and then taking the car out for a drive testing out the ABS. This forces air out of the pockets it tends to get stuck in.

 

Thanks for the reply. Front end of the car was raised with two jack stands. Purchased a non-spill funnel as well that worked when filling the radiator. All the coolant remained in the funnel though once the radiator was filled. May end up attempting to bleed again tonight and see what happens.
Haven't heard about the ABS trick. I'll be sure to try that.
Any idea why coolant doesn't come out of the bleeder despite the reservoir and radiator being full?

 

The "ABS trick" is basically once the engine is warmed up, floor it full throttle up to about 30mph and then slam on the brakes HARD. It throws all the water rearward and then forward in the engine and will displace air pockets. The trick is getting the water to be thrown up against the thermostat which will open the thermostat. A left/right slalom can help too.